Lamp-socket and key-holder therefor



(No Model.) .7

H. P. BALL & A. METZGER. LAMP SOCKET AND KEY HOLDER THEREFOR.

Patented June 6, 1893.

awueubou 7W M UNITED STATE ATENT OFFICE.

HENRY PRICE BALLAND AMANDUS *METZGER, OF SCI-IENEOTADY,

NEW YORK. V

LAMP-SOCKET AND KEY-HOLDER THEREFOR.

SPECIFICATION forming part of Letters Patent No. 498,758, dated June 6,1893.

Application filed August 3, 1892. Serial No. 441,997. (No model.)

' To all whom it may concern.-

Be it known that we, HENRY PRICE BALL and AMANDUS METZGER, both citizensof the United States, residing at Schenectady, in the county ofSchenectady and State of New York, have invented a certain new anduseful Improvement in Lamp-Sockets and Key- Holders Therefor, of whichthe following is a specification.

The present invention relates to key sockets, the main object of theinvention being to apply a key to sockets having an insulating body,directly on an end of which a sleeve terminal is secured, also toimprove the construction of the switch mechanism, and the inventionconsists in the several features and combinations designed to accomplishthese objects as hereinafter more fully set forth and claimed.

In the accompanying drawings, Figure 1 is a central section through theshell and sleeve terminal of the socket. Fig. 2 is a plan view of thesocket, the shell being removed. Fig. 3 is a perspective view of theinsulating socket body. Fig. 4 is a perspective view of the device forholding the switch spindle; and Fig. 5 is a perspective view of aclamping plate to be described.

The invention constitutes an improvement on the socket described in theapplication of A. Metzger, Serial No. 430,673, filed April 26, 1892, inwhich a socket is described having an insulating body with an extension,directly -on the end of which a screw-threaded sleeve and a fixedcentral contact-piece were mounted. In that socket no provision was madefor making and breaking the circuit, and with the construction theredescribed no such device could be used.

In the accompanying drawings, 1 is an insulating body having an integralextension 2, preferably of the shape shown most clearly in Fig. 3. Thebody and extension have a central opening 3 adapted to receive'theswitch spring and the end of the switch spindle. On opposite sides theextension is cut away as indicated at at, 5. On the latter side isformed a ledge 6 adapted to receivefthe single sheet metal punching 7,one end of which has a cam edge 8, and which is bent to form acylindrical holder 9 for the switch or key spindle 10. Projecting fromsaid spindle is a screw 11, on which may be an antifriction roller 12adapted to bear against the cam edge 8 by means of which the spindle isreciprocated when it is turned by the handle. The end of the spindleextends into the opening 3 and bears against the switch spring 13, whichforms the central contact device of the socket and which can be moved upinto operative-position or allowed to move down out of operativeposition in a well known manner. In the cut-away portion 4. is a socketterminal 14:, consisting of a metal punching, placed over thespring 13and secured by a screw passing through the body, the spring and saidterminal, and to which one wire of a circuit may be connected, being ledthereto through a hole 15. 16 is the screw-threaded sleeve forming theedge contact device of the socket. This has an internal flange 17 overwhich the horseshoe-shaped piece 18,havinga downwardly projecting arm19, carrying a binding-screw 20, is adapted to be secured by screws 21passing through the. insulating socket body from below, thus clampingthe sleeve directly to the top of the insulating extension. The secondcircuit wire, passing through the opening 16, can be connected by screw20 to this sleeve.

By mounting the sleeve contact directly 0 the top of the insulatingextension and supporting the key as described, a very simple key socketis obtained, and by forming the keyholding device of a single piece ofstamped sheet metal bent into suitable form, instead of the heavier castsleeve heretofore employed, for receiving the switch spindle, aconsiderable saving in expense and labor is efiected.

What we claim is- 1. The combination, in a socket, of an insulatingbody, having an extension directly on an end of which is secured an edgesocket contact device, a central socket contactspring, a switch spindlefor moving said spring, and a holder for said spindle secured to aledgeon said extension, substantially as. described.

2. The combination of a switch spring or arm, a spindle having aprojecting screw or device, a co-operating cam formed of a singlepunching of sheet metal having a cam edge and bent to surround thespindle to hold it This specification signed and witnessed and to giveit a lengthwise movement when this 30th day of July, 1892. turned,substantially as described. HENRY PRICE BALL. 3. A switch spindleoperating and holding AMANDUS METZGER. 5 device consisting of a sheetmetal piece 7 W'itnesses: with a coiled end 9 and a cam ed ge 8, sub- W.E. GILMORE, stantially as described.

L. VOGEL.

